Left ventricular-right atrial communication with an aneurysm of the atrioventricular membranous septum. A case report.

A 40-year-old man with combination of left ventricular-right atrial communication and aneurysm of the atrioventricular membranous septum is presented. A supravalvular type defect, 14 X 15 mm in size, was closed with a Teflon patch. An oval shaped aneurysm of the atrioventricular membranous septum, 20 X 17 mm in size was also noted, but was left untouched. To our knowledge, this is the first reported case with this combination in Japan.